钙离子对菠菜（Spinacia oleracea）叶绿体果糖二磷酸酶及卡尔文循环其他酶的作用。
Action of calcium ions on spinach (Spinacia oleracea) chloroplast fructose bisphosphatase and other enzymes of the Calvin cycle.
作者信息
Charles S A, Halliwell B
出版信息
Biochem J. 1980 Jun 15;188(3):775-9. doi: 10.1042/bj1880775.
Abstract
Thiol-treated spinach (Spinacia oleracea) chloroplast fructose bisphosphatase is powerfully inhibited by Ca2+ non-competitively with respect to its substrate, fructose 1,6-bisphosphate. 500 microM-Ca2+ causes virtually complete inhibition and the Ki is 40 microM. Severe inhibition of sedoheptulose bisphosphatase is also caused by Ca2+. A role for Ca2+ in regulation of the Calvin cycle in spinach chloroplasts is proposed.
摘要
经硫醇处理的菠菜（Spinacia oleracea）叶绿体果糖二磷酸酶，相对于其底物1,6-二磷酸果糖，会受到Ca2+的强烈非竞争性抑制。500微摩尔/升的Ca2+几乎能导致完全抑制，其抑制常数（Ki）为40微摩尔/升。Ca2+也会严重抑制景天庚酮糖二磷酸酶。本文提出了Ca2+在菠菜叶绿体卡尔文循环调控中的作用。
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